Seasonal dynamics of degree of pronunciation of smoltification changes and its dependence on body size in hatchery reared juvenile sockeye salmon Oncorhynchus nerka from the Bolshaya river basin (Western Kamchatka)

2012 ◽  
Vol 52 (1) ◽  
pp. 45-56
Author(s):  
A. I. Manukhov ◽  
V. N. Leman ◽  
E. V. Basevich
Keyword(s):  
Body Size ◽  
River Basin ◽  
Seasonal Dynamics ◽  
Sockeye Salmon ◽  
Oncorhynchus Nerka ◽  
Western Kamchatka

scholarly journals Relationship between size-weight parameters of soсkeye salmon Oncorhynchus nerka smolts emigrated from Lake Azabachye (Kamchatka River basin) in 1979–2013 and abundance of mature fsh in the sea in 1982–2016

2018 ◽  
Vol 195 ◽  
pp. 128-139
Author(s):  
V. F. Bugaev
Keyword(s):  
Body Weight ◽  
River Basin ◽  
Body Length ◽  
Main Part ◽  
Sockeye Salmon ◽  
Oncorhynchus Nerka ◽  
The Body ◽  
Positive Correlation ◽  
Kamchatka River

Two groups of juvenile sockeye salmon are feeding in Lake Azabachye. They belong to the 2nd order stock of the lake (stock A) and to other 2nd order stocks of middle and down stream tributaries of the Kamchatka River which underyearlings migrate into the lake for feeding and wintering (group E). The main part of the stock A leaves the lake to the sea at the age 2+ (mainly 2.3) and the youngsters of the group E migrate to the sea at the age 1+ (mainly 1.3). The body length and weight parameters of the stock A smolts at the age 2+ and the group E smolts at the age 1+ could be similar or dissimilar in particular years. The maximal difference between the smots of these stocks is observed in the years with higher body length and weight for the stock A. Mean for 1979–2016 length and weight of smolts at abovementioned ages are evaluated as 98.42/87.46 mm and 10.40/7.38 g for the A/E stocks. For the stock A, statistically signifcant positive correlation is noted between size-weight parameters of smolts in the years of emigration and their abundance in the years of mass return. However, the regression has a shift between the periods of emigration/return of 1979–2000/1982–2003 and 2003–2013/2006–2016. The correlation is higher for the frst period (r = 0.820; P < 0.001 for body weight and r = 0.797; P < 0.001 for body length, n = 16) than for the second one with higher abundance (r = 0.669; P < 0.05 for body weight and r = 0.711; P < 0.05 for body length, n = 11). On opposite, the returns of the group E depend weakly on size-weight parameters of its smolts for the period of emigration/return of 1979–1997/1982–2000 (no data for return in 1999) and the dependence is insignifcant for the period of 2000–2013/2003–2016.

Comparison of fecundity-length-latitude relationships between nonanadromous (kokanee) and anadromous sockeye salmon (Oncorhynchus nerka)

2000 ◽  
Vol 78 (10) ◽  
pp. 1791-1805 ◽  
Author(s):  
M D McGurk
Keyword(s):  
Body Size ◽  
Egg Size ◽  
Sockeye Salmon ◽  
Environmental Gradients ◽  
Oncorhynchus Nerka ◽  
Latitudinal Gradients ◽  
Egg Number ◽  
Latitudinal Clines ◽  
Regression Slopes ◽  
Highly Correlated

This study compared fecundity-length-latitude relationships between 25 kokanee populations (15 natural and 10 introduced) and 48 sockeye salmon populations. Significant differences confirmed the hypothesis that the two Oncorhynchus nerka variants follow different reproductive strategies: (i) fecundity is more highly correlated with length for kokanee than for sockeye salmon; (ii) kokanee have higher fecundity-length regression slopes and lower intercepts than sockeye salmon; (iii) kokanee populations share a common fecundity-length regression slope, but sockeye salmon populations do not; and (iv) average lengths and fecundities of kokanee decrease with increasing latitude, but those of sockeye salmon do not. The first three findings confirm that kokanee maintain a constant egg size while increasing egg number with increasing body size but that sockeye salmon increase both egg number and egg size with increasing body size. Kokanee egg sizes may be less variable than those of sockeye salmon because kokanee have lower and less variable energetic costs of spawning migration and tend to use spawning gravel with smaller and less variable particle sizes. Latitudinal clines in kokanee length and fecundity may reflect latitudinal gradients in temperature and duration of the growing season. Such environmental gradients may explain why kokanee populations are rarely found as far north as Alaska.

Comparative analysis of STR and SNP polymorphism in the populations of sockeye salmon (Oncorhynchus nerka) from Eastern and Western Kamchatka

2010 ◽  
Vol 46 (11) ◽  
pp. 1362-1372 ◽  
Author(s):  
A. M. Khrustaleva ◽  
A. A. Volkov ◽  
D. S. Stocklitskaya ◽  
N. S. Mugue ◽  
D. A. Zelenina
Keyword(s):  
Comparative Analysis ◽  
Sockeye Salmon ◽  
Oncorhynchus Nerka ◽  
Western Kamchatka ◽  
Snp Polymorphism

Egg burial depth by sockeye salmon (Oncorhynchus nerka): implications for survival of embryos and natural selection on female body size

1999 ◽  
Vol 77 (5) ◽  
pp. 836-841 ◽  
Author(s):  
Ryan P Steen ◽  
Thomas P Quinn
Keyword(s):  
Body Size ◽  
Female Body ◽  
Sockeye Salmon ◽  
Oncorhynchus Nerka ◽  
Female Size ◽  
Burial Depth ◽  
Female Body Size ◽  
Substrate Level ◽  
The Relationship ◽  
Stream Bed

We studied the relationship between female sockeye salmon (Oncorhynchus nerka) body size and egg burial depth in a small Alaskan stream to better understand the ways in which stream-bed scour or digging by other females might destroy embryos. Two different measurements of egg burial depth were taken: depth from the original stream-bed surface to the top of the egg pocket and depth from the disturbed substrate directly above the egg pocket to the top of the egg pocket. The former may represent the depth to which stream-bed scouring would have to go to reach the eggs, but the latter represents the depth to which a second female would have to dig to disturb the egg pocket. Larger females buried their eggs deeper, relative to the original substrate level, than smaller females. This suggests that streams with frequent scour events would select for larger females. However, mean depth from the disturbed substrate level was significantly shallower than mean depth from the original stream-bed level, suggesting that even the smallest females could dig deep enough to disturb the egg pockets of the largest females. Finally, the egg burial depth - fish size relationship that we observed was compared with published data on other salmonid species, revealing considerable variation but a clear positive relationship between female size and burial depth. Because embryonic survival is affected by scour and nest disturbance, and because changes in fish body size, density, and flow regime can affect the vulnerability of embryos to such mortality, we recommend further, standardized measurements of the relationship between egg burial depth and female body size.

scholarly journals NEMATODES OF GENUS PHILONEMA (PHILONEMIDAE) FROM SOCKEYE SALMON AND WHITESPOTTED CHAR FROM LAKE KISI (OLA RIVER BASIN, OKHOTSK SEA)

2019 ◽  
Vol 197 ◽  
pp. 194-207
Author(s):  
V. V. Pospekhov ◽  
K. V. Kusenko
Keyword(s):  
River Basin ◽  
Sockeye Salmon ◽  
Oncorhynchus Nerka ◽  
Nematode Species ◽  
Northern Coast ◽  
Okhotsk Sea ◽  
North East ◽  
Salvelinus Leucomaenis ◽  
First Time

Morphology of phylonems infesting whitespotted char Salvelinus leucomaenis and sockeye salmon Oncorhynchus nerka in Lake Kisi at the northern coast of the Okhotsk Sea is described for the first time. Sockeye was infected with adults of Philonema oncorhynchi Kuitunen-Ekbaum, 1933 and larvae of other nematode species (Philonema sp. II), and char — with adult dracunculoid nematode designated as Philonema sp. I. This Philonema sp. I differs considerably from Ph. oncorhynchi by number of reproductive papillae, their distribution, and structure of cuticular appendices on the caudal end of males. Larvae of Philonema sp. I (1st stage) and Philonema sp. II (3rd stage) are described, as well. These new data allow to reconsider the species belonging of nematodes infesting chars (Salvelinus) in North-East of Russia, which are identified now mostly as Ph. oncorhynchi.

scholarly journals ON EFFECT OF THE SIZE OF SOCKEYE SALMON ONCORHYNCHUS NERKA SMOLTS ON TIME OF THE SCALE SCLERITE FORMING DURING IMPLEMENTING OF THEIR COMPENSATORY GROWTH IN THE YEAR OF MIGRATION TO THE SEA FROM LAKE AZABACHYE (KAMCHATKA RIVER BASIN)

2018 ◽  
Vol 193 ◽  
pp. 88-98 ◽  
Author(s):  
V. F. Bugaev
Keyword(s):  
Growth Rate ◽  
River Basin ◽  
Sockeye Salmon ◽  
Compensatory Growth ◽  
Oncorhynchus Nerka ◽  
Scale Structure ◽  
Negative Dependence ◽  
Kamchatka River ◽  
Almost All

The Kamchatka River basin is the reproduction area for the secondary large Asian stock of sockeye salmon, one of the most valuable species of pacific salmons. Several major local stocks and groups of minor stocks occupy the basin, the main of them are: i) A — the aboriginal stock in Lake Azabachye (in the lower Kamchatka basin) which juveniles stay two winters in the lake and migrate to sea in the age 2+; ii) E — the transit group of local stocks spawning in the middle and lower tributaries of the Kamchatka which juveniles enter to Lake Azabachye for feeding and wintering and migrate to the sea after the wintering in the age 1+. The latter underyearlings get an additional mark on the scale (less than typical annuli) entering the Lake because of the feeding conditions change. That’s why almost all (90–95 %) juveniles have two zones of dense sclerites (ZDS) when leave Lake Azabachye, no matter of their 2+ or 1+ age. By the measurements in 1979–1987 of the smolts with two ZDS (A + E) in the year of their migration from Lake Azabachye to the sea, each sclerite on scale had formed in 6.61 days, on average, while the smolts staying in the lake for freshwater feeding (with one ZDS) formed each sclerite in 12.00 days, on average. Correspondingly, the migrants had wider distance between the sclerites (4–5 mm), as compared with those of non-migrants (2.0–2.5 mm) (with 150 times magnification). The aboriginal migrants demonstrate the effect of real compensatory growth in the year of emigration that is reflected in the scale structure as wider intersclerite distances. Negative dependence between the size of smolts and rate of their sclerites forming is observed on the data of 1987–2016 for the aboriginal stock A: the bigger the smolts at age 2+, the lower the rate, the longer the time of new sclerite forming, and the narrower the distance between sclerites, and vice versa. This dependence is interpreted as additional environment-dependent adjustment of the growth rate for the smolts with compensatory growth for their better adaptation and survival.

Variation in adult life history and morphology among Lake Washington sockeye salmon (Oncorhynchus nerka) populations in relation to habitat features and ancestral affinities

1997 ◽  
Vol 54 (1) ◽  
pp. 75-84 ◽  
Author(s):  
A P Hendry ◽  
T P Quinn
Keyword(s):  
Body Size ◽  
Sockeye Salmon ◽  
Oncorhynchus Nerka ◽  
The Body ◽  
Age Composition ◽  
Body Depth ◽  
Native Populations ◽  
Lake Washington ◽  
Baker Lake ◽  
Different Origins

Body size, age composition, and male body depth were compared among five Lake Washington sockeye salmon (Oncorhynchus nerka) populations. Two of the populations (Bear and Cottage creeks) were indigenous to the watershed and three (Cedar River, Issaquah Creek, and Pleasure Point) were non-native (from Baker Lake, Washington). To isolate the relative contributions of habitat type and ancestral relatedness to phenotypic variation, we compared populations with (i) the same origin and similar habitats, (ii) different origins and different habitats, (iii) the same origin and different habitats, and (iv) different origins and similar habitats. Spawning salmon in the Cedar River were older and larger than those in the native populations, a result consistent with their origin (contemporary Baker Lake fish were also large and old) and with habitat variation (the Cedar River is much larger than Bear and Cottage creeks). Body size and age composition did not differ among the three non-native populations, but the body depth of males spawning on the lake beach (Pleasure Point) was greater than that of males in the Cedar River, suggesting adaptive divergence. Adaptive convergence may also have occurred because the population in Issaquah Creek (intermediate-sized creek) did not differ appreciably from those in Bear and Cottage creeks.

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